P-Block Elements Ques 459

Question: Bleaching action of $ SO_2 $ is due to

[CPMT 1971, 79, 86]

Options:

A) Reduction

B) Oxidation

C) Hydrolysis

D) Its acidic nature

Show Answer

Answer:

Correct Answer: A

Solution:

$ \underset{\begin{smallmatrix} \text{ Violet} \\ \text{ }\text{vapour } \end{smallmatrix}}{\mathop{H_2SO_4+2HI\to 2H_2O+I_2+SO_2}}\uparrow $ (nascent hydrogen) Coloured flower $ +2[H]\to $ Colourless flower



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